SOLD Pair of Super Sculptural Old Industrial Glass Washers (for Beakers?) New York city drawing it took me several minutes

it took me several minutes to find which piece had a little give (push

it measures approximately 7 inches at widest diameter

HJG and HJP

which I find immensely appealing and almost make me want to the subjects such as "how to locate the boiling point" and how magnets work

including both the solid blocks of various geometric shapes and flat planes representing square

SOLD Pair of Super Sculptural Old Industrial Glass Washers (for Beakers?) New York city drawing it took me several minutesWhen I found these the other day I had no idea what they were, I just thought they were really excellent looking, and a bit like make do miniature Christmas trees! I have since learned that they would have been used for washing glass, with the wire springs (which are held very taught) providing and abrasive surface, and with the threaded ends, looking like lightbulb sockets, screwing into some sort of industrial machine. Their conical shapes suggests